IPv6 Modem

I recently purchased the ES450 because I was informed that this modem supports 3G/4G service; and IPv6/dual stack (IPv4 & v6).

Can Sierra Wireless confirm and provide some documentation with instructions to apply the configuration changes for IPv6?

If this model does not, then what is the recommended modem that will support IPv6?

Thank You,

As per ‘ALEOS 4.4.4 Software Configuration User Guide for AirLink GX400 GX440’, IPv6 is supported only in GX440.